package team.archai.nexus.boot.web.filters;

import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;
import org.apache.shiro.web.filter.authc.BasicHttpAuthenticationFilter;
import org.springframework.http.HttpStatus;
import org.springframework.web.bind.annotation.RequestMethod;
import team.archai.nexus.boot.auth.constant.AuthConstant;
import team.archai.nexus.boot.auth.token.IAuth;
import team.archai.nexus.boot.auth.token.ShiroJwtAuth;
import team.archai.nexus.boot.auth.util.AuthUtil;
import team.archai.nexus.boot.constant.HttpEnum;
import team.archai.nexus.boot.tool.Console;
import team.archai.nexus.boot.tool.HttpUtil;
import team.archai.nexus.boot.web.response.ResultUtil;

import javax.servlet.ServletRequest;
import javax.servlet.ServletResponse;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

/**
 * @description: 自定义shiro filter
 * @author: lishibin
 * @create: 2020-06-27 18:28
 **/
public class ArchaiNexusWebFilter extends BasicHttpAuthenticationFilter {

    private final Log log = LogFactory.getLog(ArchaiNexusWebFilter.class);

    @Override
    protected boolean isAccessAllowed(ServletRequest request, ServletResponse response, Object mappedValue) {
        if (request instanceof HttpServletRequest) {
            HttpServletRequest httpServletRequest = (HttpServletRequest) request;
            if (httpServletRequest.getMethod().equals(RequestMethod.OPTIONS.name())) {
                return true;
            }
        }
        try {
            HttpServletRequest httpServletRequest = (HttpServletRequest) request;
            Console.info("Request  Url:" + httpServletRequest.getRequestURI());
            executeLogin(request, response);
            return true;
        } catch (Exception e) {
            log.error(e);
            HttpUtil.responseError(response, HttpEnum.UNAUTHORIZED, ResultUtil.out(HttpEnum.TOKEN_INVALID));
            return false;
        }

    }

    /**
     *
     */
    @Override
    protected boolean executeLogin(ServletRequest request, ServletResponse response) {
        HttpServletRequest httpServletRequest = (HttpServletRequest) request;
        String token = httpServletRequest.getHeader(AuthConstant.TOKEN_HEADER);
        IAuth authInfo = AuthUtil.parse(token);
        ShiroJwtAuth auth = new ShiroJwtAuth(token, authInfo.getPrincipal());
        getSubject(request, response).login(auth);
        return true;
    }

    /**
     * 对跨域提供支持
     */
    @Override
    protected boolean preHandle(ServletRequest request, ServletResponse response) throws Exception {
        HttpServletRequest httpServletRequest = (HttpServletRequest) request;
        HttpServletResponse httpServletResponse = (HttpServletResponse) response;
        httpServletResponse.setHeader("Access-control-Allow-Origin", httpServletRequest.getHeader("Origin"));
        httpServletResponse.setHeader("Access-Control-Allow-Methods", "GET,POST,OPTIONS,PUT,DELETE");
        httpServletResponse.setHeader("Access-Control-Allow-Headers", httpServletRequest.getHeader("Access-Control-Request-Headers"));
        // 跨域时会首先发送一个option请求，这里我们给option请求直接返回正常状态
        if (httpServletRequest.getMethod().equals(RequestMethod.OPTIONS.name())) {
            httpServletResponse.setStatus(HttpStatus.OK.value());
            return false;
        }
        return super.preHandle(request, response);
    }
}
